Hello Hans, this is the message I got after running texexec pro_mcc_a3.tex. As you can see I have increased the memory size for mp. I have attached the two tex-files. Maybe there is a mistake in the mp-code. A pdf-file will be produced, but if you check the output you will see, that one cubicle is missing! Thanks for your help! Thomas TeXExec 5.4.3 - ConTeXt / PRAGMA ADE 1997-2005 metapost : pro_mcc_a3-mpgraph format : metafun This is MetaPost, Version 0.901 (Web2C 7.5.3) (/home/thomas/texmf/web2c/natural.tcx) (pro_mcc_a3-mpgraph.mp [1] [2] [3] [4] [5] [6] [7] [8] [9] ! MetaPost capacity exceeded, sorry [main memory size=2000000]. <recently read> ; l.2277 ...aw he_zehn ((1.75),(5.6), (0.2),(17.5)); 9 output files written: pro_mcc_a3-mpgraph.1 .. pro_mcc_a3-mpgraph.9 Transcript written on pro_mcc_a3-mpgraph.log. error in metapost run : pro_mcc_a3-mpgraph.mp:2277 total run time : 0 seconds sorting and checking : running texutil TeXUtil 9.0.0 - ConTeXt / PRAGMA ADE 1992-2004 action : processing commands, lists and registers option : sorting IJ under Y option : converting high ASCII values input file : pro_mcc_a3.tui output file : pro_mcc_a3.tuo passed commands : 18 remapped keys : 0 register entries : 0 -> 0 entries 0 references synonym entries : 0 -> 0 entries embedded files : 2 total run time : 7 seconds